Nissans: a Skyline is seen in the early alpha trailer, the 350Z GEOMETRY.BIN and TEXTURES.BIN files had been deleted and the 240SX's sound files are leftover. They removed these cars for copyright issues.
Hondas: There are lots of Honda/Acura sound files in NFSMW meaning they could've been in the game but they also removed it for copyright issues.
You can't judge that "a car was planned to be in game but was cut" just by the sound (at least with with some NFS games).
Most of these sounds actually are used in game for differents engines/turbos. I can be wrong about these "cut cars", but I'm just saying that the name in the sound files is not related to the cut cars.